<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script>
        do{
            var input = prompt("请输入");
            if (input != "exit"){
                console.log(input);
            }
            
    
        }while(input != "exit");
    </script>
</head>
<body>
    
</body>
</html>